16506423529 has 2 divisors, whose sum is σ = 16506423530. Its totient is φ = 16506423528.

The previous prime is 16506423511. The next prime is 16506423539. The reversal of 16506423529 is 92532460561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16191290025 + 315133504 = 127245^2 + 17752^2 .

It is a cyclic number.

It is not a de Polignac number, because 16506423529 - 2⁵ = 16506423497 is a prime.

It is not a weakly prime, because it can be changed into another prime (16506423539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253211764 + 8253211765.

It is an arithmetic number, because the mean of its divisors is an integer number (8253211765).

Almost surely, 2^16506423529 is an apocalyptic number.

It is an amenable number.

16506423529 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506423529 is an equidigital number, since it uses as much as digits as its factorization.

16506423529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 16506423529 in words is "sixteen billion, five hundred six million, four hundred twenty-three thousand, five hundred twenty-nine".